August in Vladivostok is the warmest month of the year. In August, the weather in Vladivostok is typically warm. Average daily high temperature in August is about 23 degrees above zero. On average, Vladivostok has 11 sunny, 10 partly cloudy, 5 rainy, and 5 cloudy days in August. The rains are usually heavy. August as well as September is considered the most comfortable time to visit Vladivostok.